Housing



H. w. BETZLER 2,414,437

HOUSING Jan. 21, 1947.

2 Sheets-Sheet 1 Filed Dec. 5, 1942 IN VEN TOR. flew/w #5557225? Jan. 21, 1947.

H. W. BETZLER HOUSING Filed Dec. 5, 1942 FIG. 3.

2 Sheets-Sheet 2 ATTOE/Y Y Patented Jan. 21, 1947 nousmc Henry William Betzler, Rutherford, N. 1., assignor to Federal Telephone & Radio Corporation,

New York, N. Y., a corporation oi Delaware ApplicationrDecember 5, 1942, Serial No. 487,951

3 Claims (Cl. 175-366) This invention relates to housings for electrical apparatus and has for its principal objects to provide a housing which can be easily and quickly so that when the overhanging portions l3, l3 and l4, ll of the top and bottom plates are fitted over the corresponding side plates, all the assembled and disassembled and through which a cooling fiuid may be made to flow.

It is often desirable to place electrical apparatus such as stacks of plate type rectifiers in a housing and it may also be desirable to pass a cooling fiuidsuch as air through the housing. It issometimes necessary to open the housing quickly to inspect or repair the apparatus and for this purpose the housing should be of simple construction and one which can easily be assembled and disassembled.

In accordance with this invention there is provided a housing of which the several parts are made to fit together and the assembly of which is secured by a relatively small number of fastening devices such as nuts and bolts. The invention will be more fully understood from the following detailed description when considered in conjunction with the drawings of which:

Fig. 1 is a perspective view of a housing in accordance with this invention;

Fig. 2 shows the housing of Fig. 1 with two. of the walls removed to show theinterior;

Fig. 3 is a cross-sectional view taken at line 3-3 of Fig. 1; and

Fig. 4 is a cross-sectional view of a. detail taken at line 4-4 of Fig. 1.

Referring to the drawings, the housing comprises the two oppositely located sides I and 2 and the top and bottom members 3 and I, forming a prism. One of the end members 5 is composed of a square or rectangular frame work 6 holding a screen 'I through which air may blow. The

other end member comprises a funnel 8 having its enlarged end fitted against one edge of the sides I, 2, 3 and 4 and of the same outside dimensions as the frame 6. The small end of the funnel terminates in a ring 9 of dimensions adapted to fit with a pipe or source of cooling air. The top and bottom plates 3 and I comprise bent over side portions, J3, l3 and IA, ll, respectively, which cover corresponding edges of the side walls i and 2 and hold them in place. as shown in Fig. 3.

The rear edges of the side, top and bottom plates are provided with curved grooved portions, ll, ll, l1 and i8, and the front edges of these side, top and bottom plates are provided with curved grooved members which are identified by the same numbers primed. The curved grooved members are adapted to ilt over the rounded edges ll of the frame work 8 or the rear screen and of the funnel member 8 at the front as shown,

grooved members are firmly held against the corresponding rounded edges of the frames 6 and I2. As shown in Figs. 1 and 4, the grooved portions I1, l8 and i1, i8 of the lateral sides i and 2 do not extend all the way to the top and bottom edges of the sides i and 2, but merely meet the corresponding overhang of the top and bottom members 3 and 4. The assembly isfinally secured by means of studs IQ, of which six are shown, extending through the housing from top to bottom and through the top and bottom plates, these being secured by corresponding nuts and locknuts indicated by i9. By this arrangement the top and bottom plates and the side plate are firmly secured to the rear end member 5 and to the frame of the front funnel member 8 and the only fasteners required are the relatively few number of nuts on the studs.

The housin is especially well adapted for use with electrical apparatus which can be mounted on the studs, such as the plate type rectifier stack shown in Fig. 2. There are shown three stacks 20, 2| and 22, although it will be understood that any other number of staclss oi rectifier plates, or stacking arrangements, could be used. The individual rectifier elements in the stack may be of arrangement is shown in application Ser. No.

46417 38, filed November 6, 1942.

Only one of these plates, namely plate 23 is shown in detail. .This comprises a fiat base plate ordinarily of iron or steel or aluminum which may or may not be nickel coated, covered by a layer of selenium 24, on top of which there is placed a metallic counter-electrode 25. A contact member 28 is held in contact with the counter-electrode member by means of a spring member 21 which is heldagainst the contact member by means of a rivet 28 which passes through and tastens on the other side of the plate, with suitable insulating washers such as 29 for the purpose of preventing short circuiting of the contact memher to the base plate. A tab 30 from the flat contact plate 26 is carried over to a conducting washer v I 3 ers II of each element, and the adiacent washers are held in contact with each other by screwing down the nut 32. The opposite terminals of the elements are similarly arranged, these terminals being integral with the respective base plates 5 themselves. They are provided with similar washers 3| placed. over an ear of the base plate 2s and through which the corresponding stud passes. The screwing down oi'the top and bottom nuts compresses all of the washer; at the 1 a 4 fier elements thereof and also holding together said second pair of lateral walls, and a plurality oi relatively flat bus-bar-like members having apertures through which said studs pass so as to connect therewith, said bus-bar-like members being also provided with lateral tabs extending outwardly through saidfirst pair of lateral walls,

. whereby external connection with predetermined individual stacks against each other to make contact betweenadiacentwashers. Thus the individual elements in the stack are connected in parallel with each other.

It is possible to divide 03 each main stack 20, 2i and 22 into separate groups to provide desired circuit arrangements and connections. The particular grouping shown is for alt-phase bridge connection. The bus bars 33 and 34 make connections with the proper groups in each stack and 2 0 form the D. C. terminals for the rectifier circuits,

. the terminal members 83 and 38' respectively passing out through suitable slits 3'! and I! in an insulating strip 3! which is screwed over an opening in the side wall i by means 0! screws 40. 2s

The alternating current input terminals for the bridge rectifier circuit are not shown in Figsi l and 2, but one of the three required terminals I is shown in Fig. ,8, this being connected to stackto stacks 2B and "respectively. 1

An air pipe is adapted to be connected to the ring member 8 for blowing ablast-o! air or other cooling fluid through the stack between the elements thereof and out of the rear screen 1.

- This construction provides a light, v simple,

. compact housing for a rectifier which is adapted to provide cooling and thereby enable high current to be transmitted. The; housing can likewise be very quickly assembled and for repairs and inspection,

Whatis claimed is; u l. A combination rectifier, housing andinterconnection device for saidrectifier, including a plurality of stacks, each formed of a pluralityoi individual rectifier elements, -a housing enclosing said stacks and comprising iour lateral walls and two end walls forming'a prism, a first pair at op-' positely located "lateral walls havingportions adapted to engage the corresponding peripheral portions of said'end members and a second pair ,of lateral walls having overhanging portions 2| There will be two other terminals connecting groups of rectifier units other than those connected together by said studs, is made possible, said first pair of lateral walls being provided with suitable insulation and narrow slots .wherethrough said tabs project, so that a substantially air tight closure of said slots by said tabs is secured.

2. A housed rect fyin unit comprising. a plurality oi rectifierstacl s each including a mounting member projecting from each stack end, a

- housing enclosing said stacks including a pairoi ends and tour lateral walls forming a prism, means engaging the mounting members for supporting said stacks from each of a first pair of opposite lateral walls, and means. interconnecting the end margins of an opposite pair of lateral walls an the contiguous margins of said. ends forholding said ends in place, and released by removal of one of said first pair oi walls to permit.

removal of said ends.

3. A combination rectifier, housing and interconnection device for said rectifier, including a plurality of stacks, each formed of a plurality oi individual rectifier elements, a housing enclosing said stacks and comprising four lateral .walls and two end walls forming a prism, a first pair oi.

- adapted to engage the corresponding Peripheral oppositely-located lateral walls having portions portions of said end walls and a second pair or lateral walls having overhanging portions which I overhang the first pair of lateral walls and also disassembled E0 having 'meanshto engage and hold the corresponding peripheral portions of said end walls, a plurality oi studs holding together each stack and serving tointerconnect the,ind ividual rectifier elements thereof, and holdingtogether said second pair-oi lateral'walls, anda plurality oi J conductor devices having-fiat portions through which overhang the first pair oi. lateral walls, 7

a plurality of-studs holding together each stack and serving to interconnect the individual rectisubstantial air tight closure.

may w;

.which the studs pass and are connected therewith, and terminals to extend to the outside of the housing for connection with other apparatus, a

certain lateral walls beins Provided-with openings through which said terminals extend, and with insulation around said openings to provide 

